Another card shows the design of the museum; its metal exterior is meant to celebrate ironwork crafted by slaves in places like Louisiana and South Carolina. The fourth features Frederick Douglass, leader in the anti-slavery movement.

Tubman's card is a replica of an albumen print of her likeness that will be on display in the museum.

“These limited-edition SmarTrip cards commemorate the significance of having a museum on the National Mall that celebrates the richness of black culture and the vast contributions made by African Americans to our society,” said Metro General Manager and CEO Paul J. Wiedefeld.

The cards will be available Saturday online, and at Metro stations Friday Sept. 16. For those who can't wait, the cards will be available for purchase on Monday Sept. 12 at the following offices: